EXHIBIT 12



COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES



The ratio of earnings to fixed charges is calculated using the Securities and Exchange Commission guidelines.



|                                                              |  |                                    |     |                                  |   |                |  |                                |  |                                    |     |                                    |   |                                    |  |   |     |  |   |    
|------------------------------------------------------------- |  | ---------------------------------- | --- | -------------------------------- | - | -------------- |  | ------------------------------ |  | ---------------------------------- | --- | ---------------------------------- | - | ---------------------------------- |  | - | --- |  | - | ---
|                                                              |  | Successor(1)                       |     |                                  |   | Predecessor(1)
|                                                              |  | Twelve monthsendedDecember 31,2007 |     | Nine monthsendedDecember 31,2006 |   |                |  | Three monthsendedMarch 31,2006 |  | Twelve monthsendedDecember 31,2005 |     | Twelve monthsendedDecember 31,2004 |   | Twelve monthsendedDecember 31,2003
|                                                              |  | (in millions)                     
|Earnings as defined for fixed charges calculation             |  |                                    |     |                                  |   |                |  |                                |  |                                    |     |                                    |   |                                    |  |   |     |  |   |    
|Add:                                                          |  |                                    |     |                                  |   |                |  |                                |  |                                    |     |                                    |   |                                    |  |   |     |  |   |    
|Pretax income from continuing operations                      |  | $                                  | 415 |                                  | $ | 102            |  |                                |  | $                                  | 186 |                                    | $ | 412                                |  | $ | 378 |  | $ | 460
|Fixed charges                                                 |  |                                    | 139 |                                  |   | 100            |  |                                |  |                                    | 35  |                                    |   | 114                                |  |   | 106 |  |   | 134
|Deduct:                                                       |  |                                    |     |                                  |   |                |  |                                |  |                                    |     |                                    |   |                                    |  |   |     |  |   |    
|Interest capitalized(a)                                       |  |                                    | 30  |                                  |   | 14             |  |                                |  |                                    | 3   |                                    |   | 7                                  |  |   | 5   |  |   | 9  
|                                                              |  |                                    |     |                                  |   |                |  |                                |  |                                    |     |                                    |   |                                    |  |   |     |  |   |    
|Total earnings (as defined for the Fixed Charges calculation) |  | $                                  | 524 |                                  | $ | 188            |  |                                |  | $                                  | 218 |                                    | $ | 519                                |  | $ | 479 |  | $ | 585
|                                                              |  |                                    |     |                                  |   |                |  |                                |  |                                    |     |                                    |   |                                    |  |   |     |  |   |    
|Fixed charges:                                                |  |                                    |     |                                  |   |                |  |                                |  |                                    |     |                                    |   |                                    |  |   |     |  |   |    
|Interest on debt, including capitalized portions              |  | $                                  | 130 |                                  | $ | 95             |  |                                |  | $                                  | 33  |                                    | $ | 105                                |  | $ | 95  |  | $ | 124
|Estimate of interest within rental expense                    |  |                                    | 9   |                                  |   | 5              |  |                                |  |                                    | 2   |                                    |   | 9                                  |  |   | 11  |  |   | 10 
|                                                              |  |                                    |     |                                  |   |                |  |                                |  |                                    |     |                                    |   |                                    |  |   |     |  |   |    
|Total fixed charges                                           |  | $                                  | 139 |                                  | $ | 100            |  |                                |  | $                                  | 35  |                                    | $ | 114                                |  | $ | 106 |  | $ | 134
|                                                              |  |                                    |     |                                  |   |                |  |                                |  |                                    |     |                                    |   |                                    |  |   |     |  |   |    
|Ratio of earnings to fixed charges                            |  |                                    | 3.8 |                                  |   | 1.9            |  |                                |  |                                    | 6.2 |                                    |   | 4.6                                |  |   | 4.5 |  |   | 4.4

|(a) | Excludes equity costs related to AFUDC that are included in Other Income and Expenses in the Consolidated Statements of Operations.
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|(1) | See Note 1 for additional information on Predecessor and Successor reporting.
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